<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>设置轮廓的宽度</title>
    <style>
        p.one{
            border: 1px solid red;
            outline-style: solid;
            outline-width:thin ;
        }
        p.two{
            border: 1px solid red;
            outline-style: solid;
            outline-width:3ox ;
        }
    </style>
</head>
<body>
    <p class="one">This is some text in a paragraph.</p>
    <p class="two">This is some text in a paragraph.</p>
    
    <p><b>注意:</b> 如果只有一个 !DOCTYPE 指定 IE8 支持 outline 属性。</p>   
</body>
</html>